Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb53fc9f10a8e8f…

MALICIOUS

PDF

44.0 KB Created: 2021-05-12 03:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1cd4a171908f7ecb9091f2d3708d89e2 SHA-1: 5b8e9278799aa5014bad004a1a2fd8a4d9f6a8c3 SHA-256: efb53fc9f10a8e8f73e14a0521db34b336bc3c0d111f6f2131e01d531f8886ce
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links and a visual download button, strongly suggesting a lure to download a malicious file. The primary link, https://netcdn.xyz/app/479516143/wurst-1.8-game-hack, is flagged as belonging to known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/479516143/wurst-1.8-game-hack In PDF document text
    • http://www.kcmconsulting.com.au/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://playhack.in/minecraftIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E9 24588 bytes
SHA-256: f07bdb60c843e66534da19cdd866a541dd29515574f31b7c14ba8106d4cc6a57
font_01_sfnt_off0000808e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808E 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off00008a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A64 17940 bytes
SHA-256: 9ddf50010538257863564cc063c7bcca2c638885d8ca6ab03dd967993225e6a2

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